MongoDB installation to go

The 1th chapter of MongoDB installation

(Dawn Hello original works, reproduced please specify)

1.1 MongoDB Introduction

MongoDB is a database open source project based on distributed file storage. Written in the C + + language, it is designed to provide a high-performance, sustainable data storage solution for Web applications.

It is characterized by scalability, high performance, ease of use, freedom of mode, and easy storage of data.

1.1.1 Main functional characteristics

A) document-oriented storage: (class JSON data schema simple and powerful).

b) Efficient traditional storage: supports binary data and large objects such as photos and videos.

c) replication and automatic failover: The MONGO database supports data replication between servers, supporting master-slave mode and inter-server replication.

d) auto-sharding Auto-Shard supports cloud-scale scalability (in the early alpha phase): Automatic sharding supports a level of database clustering, adding additional machines dynamically.

e) Dynamic query: It supports rich query expressions. Query directives use a JSON-style tag to easily query objects and arrays embedded in the document.

f) Full index support: Includes embedded objects and arrays in the document. The query optimizer of MONGO parses the query expression and generates an efficient query plan.

g) Support multiple languages such as ruby,python,java,c++,php.

1.1.2 Applicable Scenarios

A) suitable for real-time insert, update and query, and with the application of real-time data storage required for replication and high scalability.

b) A persistent caching layer that is suitable as an information infrastructure.

c) suitable for databases consisting of dozens of or hundreds of servers. Because MONGO already contains built-in support for the MapReduce engine.

d) MONGO's Bson data format is ideal for storing and querying in a document format.

1.1.3 Not applicable scene

A) highly transactional system.

b) Traditional business intelligence applications.

c) level for complex SQL queries.

1.2 Windows Environment Installation 1.2.1 Download TAR package

mongodb-win32-x86_64-2.4.6.

1.2.2 Configuration file

Create a log folder

Java code

1. MD D:\mongodb-win32-x86_64-2.4. 6 \log

Create a configuration file for the MongoDB logpath option:

Java code

1. echo logpath=d:\mongodb-win32-x86_64-2.4. 6\log\mongo.log > d:\mongodb-win32-x86_64-2.4. 6\mongod.cfg

1.2.3 Manual Start

Start the service

Java code

1. Mongod--dbpath D:\mongodb_data
2. Or
3. Mongod--config d:\mongodb-win32-x86_64-2.4. 6\mongod.cfg

1.2.4 Service startup

Install the MongoDB program as a Windows service.

Java code

1. Installing MongoDB Services
2. Mongod--config d:\mongodb-win32-x86_64-2.4. 6\mongod.cfg--install
4. Running MongoDB Service
5. net start MongoDB
7. Removal service
8. Mongod--remove

1.2.5 REST is not enabled

When the following error occurs

REST is not enabled. Use--rest to turn on. Check that port 28017 was secured for the network too.

Workaround:

When you start with the command line:

Java code

1. Mongod--dbpath d:\mongodb_data--rest--port 27017

Reinstall System Services:

Java code

1. Mongod--dbpath d:\mongodb_data--config d:\mongodb-win32-x86_64-2.4. 6\mongod.cfg--rest--port 27017--install

1.3 Linux Environment Installation 1.3.1 Download package tgz

Mongodb-linux-i686-2.4.6.tgz

1.3.2 Creating a user

Create user

Java code

1. AddUser MongoDB
2. passwd MongoDB

1.3.3 Creating a database file

Create a database file

Java code

1. Mkdir-p/data/mongodb_data
2. Chown Mongodb/data/mongodb_data–r
3. Chgrp Mongodb/data/mongodb_data-r

1.3.4 configuration file

Create a log folder

Java code

1. mkdir/opt/mongodb/mongodb-linux-i686-2.4. 6/logs

Create a configuration file for the MongoDB logpath option:

Java code

1. echo/opt/mongodb/mongodb-linux-i686-2.4. 6/bin/mongod--dbpath/data/mongodb_data/--logpath/opt/mongodb/mongodb-linux-i686-2.4. 6/logs/mongodb.log--rest--port 27017

1.3.5 Manual Start

Start the service

Java code

1. ./mongod--dbpath/data/mongodb_data

1.3.6 service startup

Install the MongoDB program as a Linux service.

Installing MongoDB Services

Java code

1. echo/opt/mongodb/mongodb-linux-i686-2.4. 6/bin/mongod--dbpath/data/mongodb_data/--logpath/opt/mongodb/mongodb-linux-i686-2.4. 6/logs/mongodb.log--rest--port 27017–fork >>/etc/rc.local

1.4 Linked databases

Use the command line method and create the student database

Command line link disease Create a database

Java code

1. >mongo
2. >use Student

In the student database, create a user collection, insert a document

Insert a piece of data into the student database and query

Java code

1. Db.user.save ({username: "Limingnihao", nickname: "Dawn Hello", Password: "123456"})

1.5 Operation commands

Function	Command
Entering and creating a database	Use test
Add or modify user passwords	Db.adduser (' name ', ' pwd ')
View the list of users	Db.system.users.find ()
User authentication	Db.auth (' name ', ' pwd ')
Delete User	Db.removeuser (' name ')
View Master-slave replication status	Db.printreplicationinfo ()
Repairing the database	Db.repairdatabase ()
Copy Database	Db.copydatabase ("MyDB", "temp", 127.0.0.1 ");
Cloning a Database	Db.clonedatabase ("127.0.0.1");
Delete the current database	Db.dropdatabase ()
View the database currently in use	Db.status ()
Database version	Db.version ()
View All Users	Show Users
View all databases	Show DBS
See all Collection	Show collections
View Profiling	Show profile
Error message prior to query	Db.getpreverror ()
Clear Error logging	Db.reseterror ()
Create a Clustered collection (table)	Db.createcollection ("Collname", {size:20, Capped:5, max:100})
Gets the Clustered collection (table) of the specified name	Db.getcollection ("account")
Get all the clustered collections of the current DB	Db.getcollectionnames ()
Displays the status of all clustered indexes in the current DB	Db.printcollectionstats ()

1.6 Data types

Data type	Describe	Distance
Boolean value	True or False	True or false: TRUE or False
32-bit integer	A 32-bit integer. The shell does not support this type, and the shell is converted to a 64-bit floating-point number by default
64-bit integer	A 64-bit integer. The shell does not support this type, and the shell is converted to a 64-bit floating-point number by default
64-bit floating point number	64-bit floating-point number. The number in the shell is this type	{"X": 3.14, "Y": 3}
String	UTF-8 string	{"foo": "Bar"}
Object ID	12-byte Unique ID of the document	{"id": ObjectId ()}
Date	The number of milliseconds starting from the standard era	{"Date": New Date ()}
Regular expressions	A document can contain regular expressions that follow the syntax of JavaScript	{"foo":/foobar/i}
JS Code	The document can contain JavaScript code	{"X": Function () {}}
Binary data	Any byte binary string, Shell does not support
Not defined	Undefined	{"X": undefined}
Array	A collection or list of values	{"Arr": ["a", "B"]}
Inline document	A document can be used as the value of a key in a document	{"X": {"foo": "Bar"}}
Null	Represents an empty value or undefined object	{"X": null}

OBJECTID type structure:

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MongoDB installation to go